Robinair 17700Z Recovery, Recycling, Recharging Unit - Manual (Page 15)

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34700Z Recovery, Recycling, Recharging Unit
Operating Instructions – Automatic
Automatic Function contd.
Note :
• If a high-side charge has been selected, before
charging, the automatic sequence will pause and
“beep” for 30 seconds to allow the user to inject oil,
if desired. See Replenishing the A/C System Oil
instructions in this manual.
• After charging is complete, the user also has the
option to equalize the hoses. Refer to the Equalize
Hoses Procedure in this manual.
8. When the sequence is complete, the display will
show the amount of refrigerant that was recovered
and charged.
9. Close the high- and low-side coupler valves, and
remove the service hoses from the A/C system.
10. If any oil was recovered during the recovery cycle,
and the user did not inject oil before the charge
cycle, manually inject oil into the A/C system at this
time using an oil injection tool.
Operating Tips
• If problems are encountered during the
automatic sequence, the unit will “beep”
three times, and the control panel readout
will pinpoint the problem encountered. The
sequence will remain paused until the user
enters a decision regarding how to proceed.
• Before the unit begins evacuating the A/C
system during the automatic sequence, it
checks for any pressure in the system that
might damage the vacuum pump. If pressure
is detected, the unit displays
PRESSURE EXISTS
PRESS ANY KEY TO EXIT
Press any key to exit the automatic sequence.
• If a leak check was selected at the end of
vacuum, and a leak is detected, the unit
displays
LEAK CHECK FAILED
PRESS STOP TO EXIT
PRESS START TO CONTINUE
Press stop to exit the automatic sequence,
and perform needed repairs. Press start to
continue the automatic sequence despite the
failed leak check.
• To ensure an accurate leak test, it is
imperative that a thorough recovery and
evacuation of the system has been
performed. During the recovery process,
cold spots can develop in the automotive
system. Pockets of refrigerant in desiccant
and in system oil will continue to vaporize as
the A/C system temperature equalizes toward
ambient. As this occurs, A/C system pressure
will increase, which may be interpreted by
the unit as a leak.
This will vary somewhat with ambient
temperature conditions.